The Telegraph has a great story about the building of a 20ft tall 'bat tower' near Huddersfield. Designed to mimic the local traditional mill chimneys, it provides a home to many bats and is much more engaging (for fund raising in particular) than simply buying vast quantities of imagination-free bat boxes.
The image above is one of my own night-time bat flashing efforts. See the original post on the photographic technique (ropey as it is).
